June 25 is Philippine Arbor Day! Here are 7 things you need to know about it 7.) The word ‘arbor’ is of Latin origin meaning tree. 6.) It’s a holiday in which individuals or groups of people are encouraged to plant and care for trees. 5.) Although not as widely known, some countries have been celebrating Arbor Day every year for more than 200 years now. 4.) It was first observed in 1805 in the small Spanish village of Villanueva de la Sierra through the efforts of a local priest, Don Ramón Vacas Roxo, who invoked love and respect for nature through tree-planting. 3.) Today, it is observed in 40 countries worldwide including United States, United Kingdom, Australia, the Netherlands, and Japan.